You don't know what cramped is until you've been in the cockpit of a B-52. For such a huge airplane, the flight deck is really squeezy with all of the instrumentation, avionics and 3-4 crew. That and the fact that the original airframe was intended to be a tandem cockpit instead of the side-by-side configurtion.
The typical B-52G/H had a dry gross weight around 188,000 lbs. It had a fuel capacity around 300,000 lbs for a max gross of 488,000 lbs (no weapons). The standard J-57 turbojet KC-135 has a max gross weight around 298,000. The Buff could carry more weight in fuel than a the total gross weight of a fully loaded tanker.